Femtosecond high-order harmonic transient absorption spectroscopy is used to observe
electromagnetically induced transparency-like behavior as well as induced absorption in the …

The brilliance of modern synchrotron radiation sources and capabilities of new
instrumentation facilitate molecular resonant inelastic soft X-ray scattering with high spectral …

The Stark effect on the doubly excited states of helium below the N= 2 threshold has been
studied by vacuum ultraviolet fluorescence yield spectroscopy. Two new series of states are …

Electron-impact ejected electron spectra of He below the He+ N= 2 threshold have been
measured for all combinations of incident energies 550, 150, and 75 eV and ejected …

用B 样条基组展开方法结合模型势计算了Rydberg 锂原子在平行电磁场下的振子强度谱.
径向和角向均采用高阶B 样条基组. 计算结果与已有的实验结果符合得很好. 利用分波分析法 …

We study the Stark effect on doubly excited states of the helium atom below N= 2. We
present the ab initio photoionization and total inelastic photon scattering cross sections …

We present a complex-scaling (CS) generalized pseudospectral (GPS) method in
hyperspherical coordinates (HSC) for ab initio and accurate treatment of the resonance …

We present a detailed theoretical study of two-photon above-threshold excitation to the
lowest dipole forbidden 1 S e and 1 D e autoionizing states of helium with free-electron-laser …

An influence of static magnetic fields on the fluorescence yield spectrum of He in the vicinity
of the N= 2 thresholds has been observed. The experimental results are in excellent …

We have measured the lifetimes of P e 1 (n= 9–12) doubly excited states in static electric
fields (1–6 kV∕ cm) by observing the decay of the fluorescence signal as a function of time …